© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Ty-Newydd Dyke is a linear earthwork of uncertain date and purpose located in Wales. The monument runs across landscape underlain by Ashgill Rocks, a sequence of mudstone, siltstone and sandstone deposits that form a relatively soft bedrock foundation. This geological substrate would have presented variable digging conditions when the dyke was constructed, with the finer siltstones offering less resistance than the sandstone bands interspersed through the sequence. The dyke's precise function remains unknown, though linear earthworks of this type in Wales often served defensive, territorial or boundary functions across the medieval and earlier periods. The monument is protected by Cadw under reference MG025, ensuring its preservation for future study. The lack of documentary evidence or archaeological investigation to date means that questions about the dyke's age, construction technique and social context remain open to investigation.
Ty-Newydd Dyke is a scheduled monument protected by Cadw under reference MG025. View the official record →
Ty-Newydd Dyke is a linear earthwork of uncertain date and purpose located in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference MG025.
Ty-Newydd Dyke dates from the unknown period, and is classified as a linear earthwork. It is one of over 32,000 scheduled monuments protected across the UK.
Ty-Newydd Dyke is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is MG025.
Several scheduled monuments lie within 10 km, including Tomen y Faerdre (1.6 km), Tomen y Cefnlloer (1.7 km), Aber-Naint Dyke (1.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Ty-Newydd Dyke's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Ty-Newydd Dyke stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.